Abstract. The dynamic magnetic susceptibility of the electron-nuclear system in the domain boundary (DB) has been studied theoretically takihg into account the nonlinearity that appears because of the saturation of the nuclear magnetic resonance (NMR). The spectrum of the systems oscillations in the NMR frequency region is shown to depend substantially on the excitation field strength and may be with parameters that are close to those of the NMR spectrum in DB or in the domain. A change in the spectrum is observed also with increasing parameter of electron-nuclear interaction: the field strength required to saturate the NMR in DB also increases.
(in Russian)

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